# Glossary of Thermodynamic Terms

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F
 Primary Word Secondary Word Definition Tutorial Page Link
 feedwater heater 9C7 - 9 feedwater heater closed 9C9 feedwater heater open 9C7  ,  8 first law of thermodynamics In the absence of nuclear reactions, energy cannot be created or destroyed.  Energy can only change form or be transferred.  Also known as the Conservation of Energy Principal. 1A3 first law of thermodynamics closed system 5B1 first law of thermodynamics cycles 4F2 first law of thermodynamics differential 5E1 first law of thermodynamics enthalpy form 5B10 first law of thermodynamics heat engine 4F5 first law of thermodynamics heat pump cycle 4F10 first law of thermodynamics MIMO 5B11 first law of thermodynamics open system 5B1 - 6  ,  9 - 11 first law of thermodynamics rate form 4C10 first law of thermodynamics refrigeration cycle 4F8 first law of thermodynamics SISO 5C5  ,  7  ,  9  ,  11  ,  13  ,  14  ,  16  ,  18 first law of thermodynamics steady-state 5C3  ,  7  ,  9  ,  11  ,  13  ,  14  ,  16  ,  18 first law of thermodynamics transient 5E1 - 6 flammability 10B5 flow work Also known as PV Work or Injection Work. The amount of work done on a system when a certain mass of fluid is pushed into the system, overcoming the system pressure at the systemboundary.  It is also the amount of work done by a system when a given mass of fluid is pushed out of the system, overcoming the surrounding pressure at the system boundary. 5B6 - 10 force The ability to change the momentum of matter.  In this course, it is important to note that pressure applied over a given area results in a total force equal to the product of the applied pressure and the area over which the pressure is applied. 1B5 force resistive 4A14 Fourier's Law of Conduction The transport equation that defines heat conduction.  The conduction heat flux is proportional to the temperature gradient driving force.  The proportionality constant is the thermal conductivity. 4B16 freezing The process by which a molecule makes the transition from the liquid phase to the solid phase. 2B7 fusion 2B7  ,  8 fusion latent heat of 3E13 fusion curve 2B8  ,  9